Expressing grief over the death of Indian soldiers in ceasefire violation by Pakistan in Jammu and Kashmir (J&K), West Bengal Chief Minister Mamata Banerjee on Monday said their "sacrifice for the nation will not go down in vain". Four Indian soldiers, including a 22-year-old officer, were killed and four other persons were injured on Sunday in Pakistani firing on the Line of Control (LoC) in Jammu and Kashmir's Rajouri and Poonch districts, Army officials said. The soldiers include Captain Kapil Kundu, who would have celebrated his 23rd birthday on February 10. Hailing from Haryana's Gurugram, he is survived by his mother Sunita. The others were, Riflemen Ramavatar, 27, from Baraka village in Madhya Pradesh's Gwalior, Subham Singh, 23, from Jammu and Kashmir's Kathua, and Havilder Roshan Lal, 43, from Jammu and Kashmir's Samba. "Captain Kapil Kundu, Rifleman Ramavatar, Rifleman Subham Singh & Havaldar Roshan Lal were martyred in ceasefire violation by Pakistan in BG (Bhimber Gali) sector of Rajouri. Your sacrifice for the nation will not go down in vain. Heartfelt condolences to NoK," she said in a tweet.